Abigail was his child, too. Equal parts. Though she did feel that, in the event of a tiebreaker, surely Abigail was just a tiny bit more hers, what with the gestating inside of her for nine months and what have you. Derek certainly didn’t have a flabby kangaroo pouch underneath his belly button. Still, in a perfect world, she ought to be able to invite him along in her parental fury.